diff --git a/tools/server/webui/src/lib/components/app/chat/ChatScreen/ChatScreenProcessingInfo.svelte b/tools/server/webui/src/lib/components/app/chat/ChatScreen/ChatScreenProcessingInfo.svelte
index 3f1820490b..56c8df1afa 100644
--- a/tools/server/webui/src/lib/components/app/chat/ChatScreen/ChatScreenProcessingInfo.svelte
+++ b/tools/server/webui/src/lib/components/app/chat/ChatScreen/ChatScreenProcessingInfo.svelte
@@ -63,7 +63,7 @@
 </script>
 
 <div class="chat-processing-info-container pointer-events-none" class:visible={showProcessingInfo}>
-	<div class="chat-processing-info-content {widthClasses.class}" style={widthClasses.style}>
+	<div class="chat-processing-info-content {widthClasses.class}">
 		{#each processingDetails as detail (detail)}
 			<span class="chat-processing-info-detail pointer-events-auto backdrop-blur-sm">{detail}</span>
 		{/each}
diff --git a/tools/server/webui/src/lib/stores/chat.svelte.ts b/tools/server/webui/src/lib/stores/chat.svelte.ts
index d40505c385..5027e10c4f 100644
--- a/tools/server/webui/src/lib/stores/chat.svelte.ts
+++ b/tools/server/webui/src/lib/stores/chat.svelte.ts
@@ -81,15 +81,11 @@ class ChatStore {
 	private _pendingDraftMessage = $state<string>('');
 	private _pendingDraftFiles = $state<ChatUploadedFile[]>([]);
 
-	get chatWidthClasses(): { class: string; style?: string } {
+	get chatWidthClasses(): { class: string } {
 		const currentConfig = config();
-		const autoChatWidth = currentConfig.autoChatWidth;
-
-		if (autoChatWidth) {
-			return { class: AUTO_WIDTH_CLASSES };
-		}
-
-		return { class: DEFAULT_WIDTH_CLASS };
+		return currentConfig.customChatWidth
+			? { class: AUTO_WIDTH_CLASSES }
+			: { class: DEFAULT_WIDTH_CLASS };
 	}
 
 	private setChatLoading(convId: string, loading: boolean): void {